From be44a3e6ff4ca17ff3ebccdf4d6321348672e188 Mon Sep 17 00:00:00 2001
From: Arpad Borsos <arpad.borsos@googlemail.com>
Date: Thu, 28 Jan 2021 18:25:11 +0100
Subject: [PATCH] introduce a new sharedKey option

fixes #6
---
 README.md     |  3 +++
 action.yml    |  3 +++
 src/common.ts | 19 ++++++++++++-------
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 752360a..d189d2d 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@ sensible defaults.
 : `key`
 An optional key that is added to the automatic cache key.
 
+: `sharedKey`
+An additional key that is stable over multiple jobs.
+
 : `working-directory`
 The working directory the action operates in, is case the cargo project is not
 located in the repo root.
diff --git a/action.yml b/action.yml
index fe29ead..164c909 100644
--- a/action.yml
+++ b/action.yml
@@ -5,6 +5,9 @@ inputs:
   key:
     description: "An additional key for the cache"
     required: false
+  sharedKey:
+    description: "An additional cache key that is stable over multiple jobs"
+    required: false
   working-directory:
     description: "The working directory this action should operate in"
     required: false
diff --git a/src/common.ts b/src/common.ts
index bbcc974..d5df5be 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -49,14 +49,19 @@ export async function getCacheConfig(): Promise<CacheConfig> {
 
   let key = `v0-rust-`;
 
-  let inputKey = core.getInput("key");
-  if (inputKey) {
-    key += `${inputKey}-`;
-  }
+  const sharedKey = core.getInput("sharedKey");
+  if (sharedKey) {
+    key += `${sharedKey}-`;
+  } else {
+    const inputKey = core.getInput("key");
+    if (inputKey) {
+      key += `${inputKey}-`;
+    }
 
-  const job = process.env.GITHUB_JOB;
-  if (job) {
-    key += `${job}-`;
+    const job = process.env.GITHUB_JOB;
+    if (job) {
+      key += `${job}-`;
+    }
   }
 
   key += await getRustKey();